The method of calibrating includes selecting discrete levels of cuff pressure and placing the artery or vein under study under discrete levels of induced pressure with a closed pneumatic system contained by the pressure cuff, substantially continually sensing cuff pressures at each discrete level and...http://www.google.com.au/patents/US5566677?utm_source=gb-gplus-sharePatent US5566677 - Calibration of segmental blood changes in arteries and veins during detection of atherosclerosis
